Uses of Bitset in C++

Uses of Bitset in C++
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Written by Sagar RabidasFebruary 14, 2022
15 min read
C++
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Techiio-author
Sagar Rabidas

Software Developer

Today we will start the discussion on Bitset.

C++ Bitset Function

C++ bitset is a very good optimization technique for the set of boolean values represented with the help of array bools. This special set of boolean values includes values in the format of true or fake. If the cost is proper, then it's miles representing that the array bool set includes fee as 1 which indicates that it occupies the unit bit area of 1 bit. If the array bool values encompass a fee as false which means illustration is with fee 0 which means the bit is unsaved for transition and changes.

How to Use Bitset Functions in C++?

Below are the Functions of C++ Bitset:

  1. bitset::all()
  2. bitset::any()
  3. bitset::count()
  4. bitset::flip ()
  5. bitset::none()
  6. bitet::operator()
  7. bitset::reset()
  8. bitset::set()
  9. bitset::size()
  10. bitset::test()
  11. bitset::to_string()
  12. bitset::to_ullong()
  13. bitset::to_ulong()
  14. bitset::hash()

bitset::all():-

This function is part of C++ Bitset which is used for testing and verifying whether all the bits are set properly or not.

Example: This program demonstrates bitsetall() function for the setting of every bit in the set.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<6> f;
bitset<6> override("111111");
if (!f.all())
cout << "Let us set all the bits repectively" << endl;
f |= override;
if (f.all())
cout << "Every single bit set is ready for execution and can be overriden as well." << endl;
return 0;
}

bitset::any():-

This function is used by the C++ bitset library function to set at least one bit of the stream. If not set it will not return the actual value which is needed.

Example: This program demonstrates that the bitset::any() function is used for at least set one value for the function.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<8> p;
bitset<8> ovridr("0");
if (!p.any())
cout << "Minimum of one single bit needs to get set in the array" << endl;
p |= ovridr;
if (p.any())
cout << "Any one single or minimum one bit should get set." << endl;
return 0;
}

bitset::count():-

As the name suggests this bitset::count function is also part of the bitset standard library which is used to count the number of bits present in the bitset.

Example: This program is to illustrate the bitset::count function for keeping track and checking on the count of the number of bits occupying the bit and space compared with the bits apart from the set of bits that don’t have values.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<8> k("01010000");
cout << "Given Bitset " << k << ", " << k.count() << " possess number of set bits" << endl;
return 0;
}

bitset::flip():-

bitset::flip function is used to represent the set of bit characters that toggles between the entire bitstream.

Example: This program is used to represent the bitset::flip() function which is used to represent the bits in order like the bits before calling a flip() function and bit representation after calling a flip() function.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<6> m("001101");
cout << " bits pattern before performing a flip = " << m << endl;
m.flip();
cout << " bits representation after performing a flip = " << m << endl;
return 0;
}

bitset::none():-

This function is also part of the C++ bitset stream library which is further used to test whether all the bits are properly set or kept as unset and it can be confirmed seamlessly by making use of this function.

Example: This program illustrates the function bitset::none () to represent whether all the bits are set or all the bits are unset.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<8> e;
bitset<8> overide("00");
if (e.none())
cout << "Ths function tests result whether all the bits are set or unset" << endl;
e |= overide;
if (!e.none())
cout << "Minimum one bit shoud get set among all the unset bits" << endl;
return 0;
}

bitset::operator():-

bitset::operator as part of the standard library of C++ is used to make bitset operator as bool version and reference version. Tool version with this bitset operator is used to return the values of this operator at that position. Reference bool is used to refer to that position of the return value.

Example: This program is used to demonstrate the function bitset::operator both for single bool version and reference version.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<7> g("111010");
for (int j = 0; j < 7; ++j)
cout << "Bitset without reference g[" << j << "] = " << g[j] << endl;
bitset<8> l;
cout << "Value of bitset initially = " << l << endl;
l[2] = 1;
l[4] = 1;
cout << "Bitset value after setting and modifying some value as per reference = " << l << endl;
return 0;
}

bitset::reset():-

bitset::reset as part of C++ bitset is used to reset a single bit or multiple bits of the bitset to operate.

Example: This program demonstrates both to set a single bit or all the bits to zero using the reset function.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<5> h("01011");
cout << "operation before performing reset = " << h << endl;
h.reset(1);
cout << "operation after performing reset h = " << h << endl;
cout << "operation before performing reset h = " << h << endl;
h.reset();
cout << "operation after performing reset with all the references h = " << h << endl;
return 0;
}

bitset::set():-

bitset::set function is used to set either a single bit or all the bits into some value of one or zero.

Example: This program demonstrated the bitset::set function either to zero or one.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<8> s;
cout << "operation before setting up the bitset with the bitset set s = " << s << endl;
s.set();
cout << "setting up the bitset with the given set values  s = " << s << endl;
cout << "Bit Representation before setting it with biteset set s = " << s << endl;
s.set(0, 1);
cout << "Bit Representation after setting up the bitset for the set s = " << s << endl;
return 0;
}

bitset::size():-

This function is used to calculate the size of the bitset being defined.

Example: This program illustrates the calculation of the size of the defined bitset.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<6> j;
cout << "size of the bitset becomes " << j.size() << " bits." << endl;
return 0;
}

bitset::test():-

This function as part of the C++ bitset is used for testing whether every bit in the bitset is set or unset.

Example: This program illustrates the bitset::test for verifying the bits in the bitset whether set or unset.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<6> o(10110);
if (o.test(5))
cout << "Check whether the first bit is set or not" << endl;
if (!o.test(0))
cout << "index 0th bit is set and fixed" << endl;
return 0;
}

bitset::to_string():-

This function is used to convert the object defined in the bitset to a string object.

Example: This program illustrates the bitset::to_string function for converting the bitset object into a string object.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<6> w(111010);
bitset<6>ovrride;
string s = ovrride.to_string();
cout << w << endl;
return 0;
}

bitset::to_ullong():-

This function is used to convert the bitset to unsigned long means the double type of unsigned long as part of the C++ bitset.

Example: This program illustrates unsigned long long conversion using the bitset::to_ullong.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<6> h("101010");;
auto result = h.to_ullong();
cout << "Representation of the decimal value using the ullong function " << h << " = " << result << endl;
return 0;
}

bitset::to_ulong():-

This function is used for converting the bitset to unsigned long.

Example: This program is used to demonstrate the bitset to unsigned long using the bitset::to_ulong.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<5> v("11010");;
auto result = v.to_ulong();
cout << "Representation of decimal value using the ulong function " << v << " = " << result << endl;
return 0;
}

bitset::hash():-

bitset::hash function is considered as a non-member function that is used to return the hash value of the bitset returning the hash value based on the provided bitset.

Example: This program is used to demonstrate the bitset::hash function returning the hash of the value.

Code:

#include <iostream>
#include <bitset>
using namespace std;
int main(void) {
bitset<5> a1(2);
bitset<5> a2(3);
std::hash<std::bitset<5>>hash_fun;
cout << "return a1 as Hash function  = " <<hash_fun(a1) << endl;
cout << "return a2 as Hash function  = " <<hash_fun(a2) << endl;
return 0;
}

C
C++
C++ Bitset
C++ Functions
Uses Bitset in C++
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